HAL - INRIA :: [inria-00540761, version 1] Wind projection basis for real-time animation of trees

inria-00540761, version 1

Wind projection basis for real-time animation of trees

Julien Diener ()^a^, 1, Mathieu Rodriguez () ^2, 3, Lionel Baboud () ⁴, Lionel Reveret ()^b^, 1

Computer Graphics Forum 28, 2 (2009) 533–540

Résumé : This paper presents a real-time method to animate complex scenes of thousands of trees under a user-controllable wind load. Firstly, modal analysis is applied to extract the main modes of deformation from the mechanical model of a 3D tree. The novelty of our contribution is to precompute a new basis of the modal stress of the tree under wind load. At runtime, this basis allows to replace the modal projection of the external forces by a direct mapping for any directional wind. We show that this approach can be efficiently implemented on graphics hardware. This modal animation can be simulated at low computation cost even for large scenes containing thousands of trees.

a – MENRT
b – INRIA
1 : EVASION (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Institut National Polytechnique de Grenoble (INPG) – Université Joseph Fourier - Grenoble I – Université Pierre Mendès-France - Grenoble II
2 : Laboratoire d'hydrodynamique (LadHyX)
CNRS : UMR7646 – Polytechnique - X
3 : Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF)
INRA : UMRA547 – Université Blaise Pascal - Clermont-Ferrand II
4 : ARTIS (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann)
CNRS : FR71 – INRIA – Laboratoire Jean Kuntzmann – CNRS : UMR5224 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG)

inria-00540761, version 1
http://hal.inria.fr/inria-00540761
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Contributeur : Team Artis <>
Soumis le : Lundi 29 Novembre 2010, 11:18:38
Dernière modification le : Mercredi 9 Février 2011, 11:27:36

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